Free Mobile Shop Billing Software with IMEI Tracking

Billing software built only for mobile phone shops

General billing apps treat a ₹25,000 smartphone like a packet of biscuits: a quantity in a list. A mobile shop needs to know which phone was sold, to whom, under which bill and until when the warranty runs. IMEI Billing tracks every handset by its IMEI from the supplier's bill to the customer's invoice and back again if it is returned.

It was built after reading common complaints about popular billing apps: data disappearing after an update, totals that do not match at year end, failed cloud sync, WhatsApp invoices arriving blank, slow screens on cheap phones and no proper offline mode. Every design choice below answers one of those problems.

How to use it: from purchase to WhatsApp invoice

1. Set up your shop

Open Settings & backup and enter the shop name, address, state, GSTIN, phone, UPI ID and the terms you print on bills. The GSTIN is checked for format, state code and its check character, so a typo is caught before it reaches a customer's invoice.

2. Add models and a purchase entry with IMEIs

Under Stock → Models & items add each model with brand, RAM, storage, colour, HSN (8517 for phones) and GST rate (18% for phones). Then make a New purchase: choose the supplier, enter the unit cost and paste the IMEIs, one phone per line. Each number must be 15 digits and pass the Luhn check digit test; repeats and IMEIs already in stock are flagged line by line. Chargers, cases and earphones are tracked by quantity instead.

3. Make the bill

On Sell, type the IMEI or tap Scan (uses the camera on Chrome for Android). The model, price, HSN, GST rate and warranty end date fill in. Add the customer's name and mobile if you want, a GSTIN for B2B sales, discounts and the payment split: cash, UPI, card or EMI with the financier's name. Anything not paid becomes a balance due (udhaar).

4. Share, print or save as PDF

Press Send on WhatsApp to open the chat with the full bill as text. Or print an A4 tax invoice, or an 80mm receipt on a thermal printer, and choose “Save as PDF” in the print dialog for a PDF copy.

Worked example: GST on a phone sold at an inclusive price

A customer in Pune buys a phone for ₹14,999 including 18% GST from a Maharashtra shop. Taxable value is 14,999 × 100 ÷ 118 = ₹12,711.02, so total GST is ₹2,287.98, split as CGST ₹1,143.99 and SGST ₹1,143.99. If the same phone is billed to a dealer in Karnataka, the place of supply differs from the shop state, so the full ₹2,287.98 is IGST. The app rounds each line to the paisa and keeps tax equal to price minus taxable value, so the bill total is exactly what the customer paid.

Why your totals will match at year end

• No deletions. Bills are cancelled with a reason, never deleted, and returns get their own credit note number.
• Append-only audit log of every sale, purchase, return, payment and settings change.
• Integrity check recomputes every bill from its line items and flags any mismatch, numbering gap or IMEI sold twice.
• All-or-nothing saves. A sale, its stock change and its invoice number are written in one database transaction.
• Daily backup reminder and a status bar that shows when you last backed up.

Reports for your CA

Daily sales with cash, UPI, card and EMI collections; GST summary by rate with taxable value, CGST, SGST and IGST; HSN-wise summary; profit per IMEI; stock value with aging (0–30, 31–60, 61–90 and 90+ days); and customer dues. Every report exports to CSV for Excel or your accountant. Check the figures with your CA before filing returns.

How it compares with paid billing apps

Paid apps such as Vyapar, myBillBook or Marg add cloud sync, multi-user access and e-invoicing; their full feature sets need a paid plan. IMEI Billing is free and focused on one trade: per-IMEI stock, offline use and simple backups. It does not generate e-invoice IRNs or e-way bills and has no multi-device sync, so it suits single-counter shops. Data stays on your device and you own the backup file.